ArticleJournal of epidemiology2011
Serum 25-hydroxyvitamin d concentrations and season-specific correlates in Japanese adults.
Article in Journal of epidemiology, 2011. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 20 papers.
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Who cites it
20 citing papers in PubMed, 55 citations in OpenAlex.
- Investigation of 25-hydroxy vitamin D deficiency prevelance in healthy adults aged 18-65 years in Istanbul, Türkiye.Journal of medical biochemistry · 2025Article
- Vitamin D deficiency promotes intracranial aneurysm rupture.Journal of cerebral blood flow and metabolism : official journal of the International Society of Cerebral Blood Flow and Metabolism · 2024Article
- Seasonal variation of serum 25-hydroxyvitamin D level in hemodialysis patients in the northernmost island of Japan.Clinical and experimental nephrology · 2021Observational
- Patients with higher vitamin D levels show stronger improvement of self-reported depressive symptoms in psychogeriatric day-care setting.Journal of neural transmission (Vienna, Austria : 1996) · 2021Article
- Relationship between Vitamin D levels and pain and disease activity in patients with newly diagnosed axial spondyloarthritis.International journal of nursing sciences · 2020Article
- Associations Between Serum 25-Hydroxyvitamin D Levels and Thyroid Function Parameters in Previously Healthy Children Aged 6 to 24 Months.Risk management and healthcare policy · 2020Article
- Physical inactivity and vitamin D deficiency in hospitalized elderlies.Journal of bone and mineral metabolism · 2019Article
- Association between vitamin D intake and bone mineral density in Koreans aged ≥ 50 years: analysis of the 2009 Korea National Health and Nutrition Examination Survey using a newly established vitamin D database.Nutrition research and practice · 2019Article
- Association of serum vitamin D concentrations with dietary patterns in children and adolescents.Nutrition journal · 2018Article
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- Validity of a self-administered diet history questionnaire for estimating vitamin D intakes of Japanese pregnant women.Maternal & child nutrition · 2015Article
- Fibroblast growth factor 23 and 25-hydroxyvitamin D levels are associated with estimated glomerular filtration rate decline.Kidney international supplements · 2013Article
- Determinants of serum levels of vitamin D: a study of life-style, menopausal status, dietary intake, serum calcium, and PTH.BMC women's health · 2013Article
- Sunlight and other determinants of circulating 25-hydroxyvitamin D levels in black and white participants in a nationwide U.S. study.American journal of epidemiology · 2013Article
- North-South gradients of melanomas and non-melanomas: A role of vitamin D?Dermato-endocrinology · 2013Article
- Biologically efficient solar radiation: Vitamin D production and induction of cutaneous malignant melanoma.Dermato-endocrinology · 2013Article
- Variability and reproducibility of circulating vitamin D in a nationwide U.S. population.The Journal of clinical endocrinology and metabolism · 2013Article
- Review
- Prevalence and Determinants of Low Serum Vitamin D Among Women Attending Infertility Clinics in Japan: A Real-World Multicenter Cross-Sectional Study.Reproductive medicine and biologyArticle
Corrections and comments
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Authors and funding
7 authors at 3 institutions in 2 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
backgroundSeveral lines of evidence indicate an important role for vitamin D in the prevention of a range of diseases. Blood vitamin D levels show clear seasonal variation; however, data on the determinants of vitamin D status for each season are limited. We investigated the association between lifestyle and serum vitamin D concentration by season in Japanese workers.
methodsSubjects were 312 men and 217 women aged 21 to 67 years who worked in municipal offices in Northern Kyushu, Japan and participated in a periodic checkup in July or November. Multiple linear regression analysis was used to examine the association between serum 25-hydroxivitamin D concentrations and lifestyle factors for each season.
resultsMean serum 25-hydroxyvitamin D concentration was 27.4 ng/ml (68.4 nmol/L) and 21.4 ng/ml (53.4 nmol/L) for workers surveyed in July and November, respectively (P < 0.001); the prevalence of vitamin D deficiency (<20 ng/ml) was 9.3% and 46.7%, respectively (P < 0.001). In November, dietary vitamin D intake (in both sexes) and nonsmoking and physical activity (in men) were significantly associated with higher concentrations of serum 25-hydroxyvitamin D. In summer, fish/shellfish intake was associated with higher serum 25-hydroxyvitamin D concentrations in women.
conclusionsVitamin D deficiency is common in Japanese workers during seasons with limited sunlight. The lifestyle correlates of favorable vitamin D status in November were physical activity, dietary vitamin D intake, and nonsmoking.
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